EMF generator

hello all,

I am building an EMF generator that will entrain brainwaves to alter
ones brainwaves and bring on a desired state of consciousness, such
as: meditation (that would noramlly take years of practise to master),
OOBE's, lucid dreams, sleep etc.

this generator consists of an electromagnet made from magnetic wire
wrapped about 1000 time round a U shaped iron core, powered by two 9v
batterys in series. the iron core is large, about 30cm end-to-end and
would create a electromagnetic field around the users head. as you
can(kinda) see here:
_______
/ \<----U shaped electromagnet
| (HEAD |
| GOES |
| HERE) |

my question is how would I alter the frequency of the field generated?

I know the strength of the magnet only effects the amplitude (or
power) of the field, so I assume the number of turns around the core
does not effects the frequency.

anyone know???

thanks phil

 

Complete details here: http://www.frankenstein1931.com/pictures.html